CVE-2026-53193

In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Forcibly close timer instances at closing When snd_timer object is freed via snd_timer_free() and still pending snd_timer_instance objects are assigned to the timer object, it tries to unlink all instances and just set NULL to each ti->timer, then releases the resources immediately. The problem is, however, when there are slave timer instances that are associated with a master instance linked to this timer: namely, those slave instances still point to the freed timer object although the master instance is unlinked, which may lead to user-after-free. The bug can be easily triggered particularly when a new userspace-driven timers (CONFIG_SND_UTIMER) is involved, since it can create and delete the timer object via a simple file open/close, while the other applications may keep accessing to that timer. This patch is an attempt to paper over the problem above: now instead of just unlinking, call snd_timer_close[_locked]() forcibly for each pending timer instance, so that all assigned slave timer instances are properly detached, too. Since snd_timer_close() might be called later by the driver that created that instance, the check of SNDRV_TIMER_IFLG_DEAD is added at the beginning, too.

• CWE-416

• https://git.kernel.org/stable/c/586b219a22b1032b28b8bd356b963276c5e5bf53Patch
• https://git.kernel.org/stable/c/60e73ab87b84bbd6bd7ddd1d16019a3a3705ab8fPatch
• https://git.kernel.org/stable/c/da3039e91d1f835874ed6e9a33ea19ee80c2cb92Patch
• https://git.kernel.org/stable/c/f46093dd22969037beb1fce2e043f3236be41c92Patch

Published

Jun 25, 2026

Last Modified

Jul 6, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-53188In the Linux kernel, the following vulnerability has been re…8.8
• CVE-2026-53189In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-5319A security vulnerability has been detected in itsourcecode P…4.3
• CVE-2026-53190In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53191In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-53192In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-53194In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-53195In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-53196In the Linux kernel, the following vulnerability has been re…6.8
• CVE-2026-53197In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53198In the Linux kernel, the following vulnerability has been re…8.8
• CVE-2026-53199In the Linux kernel, the following vulnerability has been re…7.5